[Source: Reuters]

China called for vigilance on Friday as a surge of respiratory illness hit schools and hospitals and the World Health Organization, which has asked the government for disease data, said no unusual or novel pathogens had been detected.

China is grappling with a spike in respiratory illnesses as it enters its first full winter season since it lifted strict COVID-19 restrictions in December, with cases among children appearing especially high in northern areas like Beijing and Liaoning province where hospitals are warning of long waits.

The State Council said influenza would peak this winter and spring and mycoplasma pneumoniae infection would continue to be high in some areas in future. It also warned of the risk of a rebound in COVID infections.

The situation came into the spotlight this week when the WHO asked China for more information, citing a report by the Program for Monitoring Emerging Diseases (ProMED) on clusters of undiagnosed pneumonia in children.

Both China and the WHO have faced questions about the transparency of reporting on the earliest COVID-19 cases that emerged in the central city of Wuhan in late 2019.

On Thursday, the WHO said China had responded to its request and the data it provided suggested the cases were linked to the lifting of COVID curbs along with the circulation of known pathogens like mycoplasma pneumoniae, a common bacterial infection that typically affects children, which has circulated since May.